PARTS OF NATURAL NUMBERS 2 PROBLEMS To see the answer, pass your mouse over the colored area. 11. Numbers that end in 0's. How much is
12. How much is
13. Increase or decrease by a part. Last week a blouse cost $36. 14. A photograph measures 9 inches
by 12 inches. If it will be enlarged 12 inches by 16 inches. 15. In 1990, the population was 30,000. By the year 2000, the population 36,000 16. Janet used to earn $28,000 a year. In her new job, she makes one 17. A 18. How much is 18. a) Two and a half times 40? 100 18 b) One and a half times 12? 18 18. c) One and a quarter times 20? 25 18. d) Two and a quarter times 8? 18 18. e) Three and a half times 10? 35 18. f) Five and a third times 6? 32 15. g) One and a quarter times 100? 125 15. h) One and three quarters times 100? 175 19. Finding a part by decomposing. Complete the following. 19. a) Half of 46 = Half of + Half of = 18. b) Half of 58 = Half of 50 + Half of 8 = 25 + 4 = 29 19. c) Half of 112 = Half of 100 + Half of 12 = 50 + 6 = 56 19. d) A third of 72 = A third of 60 + A third of 12 = 24 19. e) A third of 690 = A third of 600 + A third of 90 = 230 19. f) An eighth of $42.40 = An eighth of $40 + 19. f) An eighth of $42.40 = An eighth of $2.40 = $5.30 10. Can you calculate a third of each one mentally? How much is two 10. a) 42 42 = 30 + 12. One third = 10 + 4 = 14. Two thirds = 28. 10. b) 195 195 = 180 + 15. One third = 60 + 5 = 65. Two thirds = 130. 11. c) 234 78; 156 d) $22.50 $7.50; $15.00 11. e) $14.40 $4.80; 9.60 f) $31.20 $10.40; $20.80 11. Calculate mentally by decomposing.
12. Write a tenth of each of the following. Write a hundredth.
13. Calculator problems 13. a) Two thirds of 82,317 = 54,878 13. b) Three fourths of $318.56 = $238.92 13. c) Four fifths of $893.50 = $714.80 13. d) Five eighths of $5,045.33 = $3,153.33 14. a) How many ounces are there in half a pound? 14. b) How many ounces are in a quarter of a pound? 4 14. c) How many in three quarters of a pound? 12 14. d) How many ounces are in an eighth of a pound? 2 14. e) How many in seven eighths of a pound? 14 15. a) How many ounces are there in a quarter of a cup? 15. a) (1 cup = 8 ounces) 2 ounces 15. b) How many ounces are in three quarters of a cup? 6
16. a) How many centimeters (cm) are there in a tenth of a meter? 16. a) (1 m = 100 cm) 10 16. b) How many centimeters are in a quarter of a meter? 25 16. c) How many centimeters are in a fifth of a meter? 20 16. d) How many in three fifths of a meter? 60 17. How many feet are there in three quarters of a mile? 17. (1 mile = 5,280 feet) 3,960 18 How many yards are there in nine tenths of a mile? 18. (1 mile = 1,760 yards) 1,584 19. Percent 19.
a) What number is a third of 100?
19. d) How much is a third of $21? $7
20. Calculator problem. Round off to two decimal digits. 20. a) A sixth of the class got A. What percent got A? 100 ÷ 616.67% 20. b) A seventh of the class got B. What percent got B? 14.29% 20. c) Three eighths of the class got C. What percent got C? 37.5% Continue on to the next section. or Return to the previous section. Copyright © 2018 Lawrence Spector Questions or comments? E-mail: themathpage@yandex.com Private tutoring available. |